Cita APA (7a ed.)
Dean, M. Opportunities: Intermediate : Language Powerbook. Pearson.
Cita estilo Chicago (17a ed.)
Dean, Michael. Opportunities: Intermediate : Language Powerbook. Harlow, Inglaterra: Pearson.
Cita MLA (9a ed.)
Dean, Michael. Opportunities: Intermediate : Language Powerbook. Pearson.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.